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Home >> Nissan-Datsun >> 2007 >> Altima Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing (Qr25DE) (Except For CALIFORNIA) >> Ignition Signal >> Component Function Check
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Component Function Check

  1. INSPECTION START

    Turn ignition switch OFF, and restart engine.

    Does the engine start? 

    YES-1: With CONSULT-III: GO TO 2.

    YES-2: Without CONSULT-III: GO TO  3.

    NO: Go to "DIAGNOSIS PROCEDURE ".

  2. IGNITION SIGNAL FUNCTION

    With CONSULT-III 

    1. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
    2. Make sure that each circuit produces a momentary engine speed drop.

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Go to "DIAGNOSIS PROCEDURE ".

  3. IGNITION SIGNAL FUNCTION

    Without CONSULT-III 

    1. Let engine idle.
    2. Read the voltage signal between ECM harness connector and ground.
      ECM TERMINALS VOLTAGE SIGNALS SPECIFICATION

      ECM Ground Voltage signal
      Connector Terminal
      F14 9 Ground
      G04887978
      10
      11
      21
    NOTE: The pulse cycle changes depending on RPM at idle.

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Go to "DIAGNOSIS PROCEDURE ".

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